Moscow forced the cut in American diplomatic staff earlier this year in retaliation for U.S. sanctions. Washington had to reduce its diplomatic staff by 755 people.

Secretary of State Rex Tillerson had said the U.S. would respond by September.

The Russian offices must close by Saturday. The order affects Russia's "chancery annex" in Washington and a "consular annex" in New York.

Russia's foreign minister voiced regret about the U.S. decision to close its consulate in San Francisco and scale back two other diplomatic offices.

Russia says Foreign Minister Sergey Lavrov "expressed regret about the escalation of tensions in bilateral ties" in a phone call with Tillerson. The Russian Foreign Ministry said Lavrov argued it wasn't Russia that started the escalation.

The ministry said Tillerson called to tell his Russian counterpart about the U.S. move.

The U.S. said Russian diplomats who work at three diplomatic facilities being closed by the U.S. can be reassigned to other Russian consulates or posts in the United States.

A senior American official said the U.S. has told Russia it isn't kicking any diplomats out of the country. The official said Russia will continue to own the buildings that house the Russian posts. The official adds that Russia can sell the buildings or otherwise dispose of them. One is leased.